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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Implies the amount of estrogen production






2. What makes the milk flow through the mammary glands?






3. 24 hours before end of estrus cycle






4. 147 days






5. Knife-loose ~1wk of growth. band-loose ~2wks of growth.






6. Milk ~305 days - dry 60 days prior to calving






7. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






8. Sperm production






9. Superior genes are _______ to multiply






10. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.






11. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers






12. 30 hours after estrus begins






13. Contains and regulates the temp of the testes for sperm production






14. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed






15. Animal which has been castrated after puberty






16. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.

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17. Sperm is produced here






18. Contains and regulates the temp of the testes for sperm production






19. When are steers and heifers weaned from bottle feeding?






20. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm






21. (male) pushes the testes upward toward the body for warmth or protection






22. FEED






23. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.






24. (switzerland) 2nd in size and milk production - most muscle -






25. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.






26. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.






27. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






28. Scar tissue plugs up chambers of udder






29. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.

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30. The more stressed out the male is - the less sperm he is going to produce






31. 283 days






32. 265-285 days






33. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase






34. (LH) stimulates the Leydig cells to produce testosterone






35. 2 month growth cycle. stored in the epididymis of the bull






36. 19-23 (21) days






37. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood






38. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






39. FEED






40. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood






41. To remove/separate testicles from animal's body before animal reaches puberty






42. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat






43. Can survive ~7 days in cow. vast majority <48 hours






44. Why Dairy calves are fed powdered milk.






45. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING






46. Days which have increasing daylight hours

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47. 1-2 days






48. Provide nourishment for the developing sperm






49. Days which have decreasing daylight hours

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50. 19-23 (21) days







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